Multi-tier planter unit



FIG. 1 is a perspective view of a multi-tier planter unit showing my new design;

FIG. 2 is a front view thereof, the rear being identical;

FIG. 3 is a side view thereof, both sides being identical;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof. 

The ornamental design for a multi-tier planter unit, as shown. 